Processing of thermal mirror signals under continuous wave excitation
A.V. Kalenskii, A.A. Zvekov, D.R. Nurmuhametov, O.N. Bulgakova

 

Kemerovo State University, Kemerovo, Russia,
Federal Research Center of Coal and Coal Chemistry SB RAS (Institute of coal chemistry and material science), Kemerovo, Russia

Full text of article: Russian language.

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Abstract:
The main features of the photothermal mirror signals arising under the continuous wave excitation were analyzed in terms of a model that takes account of thermal, mechanical, and diffraction effects. Formulae to describe the initial slope and stationary value of the signal were derived and compared with the numerical simulation results. We suggested an approach to processing  the thermal mirror signals  based on exploiting the initial slope and stationary value. The method was verified using numerical simulation and experimental results. We compared the method performance with the conventional approach using thermal mirror signals excited in the luminescent glasses. It was shown that the developed technique has an essentially lower computational cost, while offering a comparable level of accuracy.

Keywords:
photothermal spectroscopy, photothermal effects, thermal mirror method, phase shift, experimental results processing.

Citation:
Kalenskii AV, Zvekov AA, Nurmuhametov DR, Bulgakova ON. Processing of thermal mirror signals under continuous wave excitation. Computer Optics 2017; 41(3): 369-376. DOI: 10.18287/2412-6179-2017-41-3-369-376.

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